Granted Patent
Utility
US 6,144,722 · App. 08/880,008
System and method for programmable telephone subscriber line test in ring mode
Inventors:
Jeffrey J. Anderson, Yan Zhou
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Jun 20, 1997
Inventors
Jeffrey J. Anderson
Yan Zhou
Assignee (at issue)
Advanced Micro Devices, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.